Existing Microbore System - Extending the System Questions

[kevplumb]

try micrafolds imi still do them

no its nit a typo

 

[diybristol]

ok I'm about to do this now...

So T- Off from the 22mm pipe from the boiler is better than messing with manifolds?

I was talking to someone else I know, he got microbore too and in his extension he went to 15mm but didn't know how as plumber did it.

so if I, T- off from before the manifold, and need 2 radiators upstairs/ 2 downstairs then I can take off the upstairs airing cupboard and come straight down into the extension to the ground floor with plastic 15mm and run it straight into 4 rad's...

but the only thing I don't understand then is the cirulation cos if if the 15mm pipe T's off before the microbore how will it get round the whole lot plus the exisiting bore???

Thanks for all you help!

 

[doitall]

you have to t off the heating circuit

 

[diybristol]

ok, so the pipes come down from the boiler into floor and then left and right to manifolds etc... so T-off here?

Am I right in thinking this will work though?

as worried if I set it all up and then run system and the water won't pump round proper cos of using mixed pipes

 

[kevplumb]

you have to t off the heating circuit

 

[Bahco]

Branch off the 22 mm in 15 mm to each rad i.e cut in the 22 F and R 4 times to feed each rad.

You can alternately only cut in twice and feed 2 rads from the same branch.